2KN/2KP
1-4-69
(52)
No transfer bias is
output.
1. Faulty connection of con-
nector of transfer high
voltage PWB.
See page 1-4-51.
2. Defective engine PWB.
3. Defective transfer high
voltage PWB.
(53)
The original size is
not detected.
1. Defective original detec-
tion switch.
If the level of YC9-2 on the scanner PWB does not go low when
the original detection switch is turned on and off, replace the origi-
nal detection switch.
(54)
The original size is
not detected cor-
rectly.
1. Original is not placed cor-
rectly.
Check the original and correct if necessary.
2. Poor contact in the origi-
nal size detection sensor
connector terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
3. Defective original size
detection sensor.
Check if sensor operates correctly. If not, replace it.
(55)
The touch panel keys
do not work.
1. Poor contact in the touch
panel connector termi-
nals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
2. Defective touch panel,
operation PWB or main
PWB.
If any keys do not work after the touch panel has been initialized,
replace the touch panel, operation PWB or main PWB.
(56)
The message
requesting paper to
be loaded is shown
when paper is
present in cassette 1.
1. Poor contact in paper
empty switch 1 connector
terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
2. Defective paper empty
switch 1.
Check if YC7-B5 on the deck PWB goes low when paper empty
switch 1 is turned on with 5 V DC present at YC7-B6 on the deck
PWB. If not, replace paper empty switch 1.
3. Defective deck PWB.
Replace the deck PWB even if checking or correcting other mea-
sures.
(57)
The message
requesting paper to
be loaded is shown
when paper is
present in cassette 2.
1. Poor contact in paper
empty switch 2 connector
terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
2. Defective paper empty
switch 2.
Check if YC7-B11 on the deck PWB goes low when paper empty
switch 2 is turned on with 5 V DC present at YC7-B12 on the deck
PWB. If not, replace paper empty switch 2.
3. Defective deck PWB.
Replace the deck PWB even if checking or correcting other mea-
sures.
(58)
The message
requesting paper to
be loaded is shown
when paper is
present in cassette 3.
1. Poor contact in paper
empty switch 3 connector
terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
2. Defective paper empty
switch 3.
Check if YC4-9 on the cassette PWB goes low when paper empty
switch 3 is turned on with 5 V DC present at YC4-7 on the cas-
sette PWB. If not, replace paper empty switch 3.
3. Defective cassette PWB.
Replace the cassette PWB even if checking or correcting other
measures.
Problem
Causes
Check procedures/corrective measures
Summary of Contents for TASKalfa 620
Page 1: ...SERVICE MANUAL Published in August 2009 842KP112 2KPSM062 Rev 2 TASKalfa 620 820 ...
Page 4: ...This page is intentionally left blank ...
Page 10: ...This page is intentionally left blank ...
Page 144: ...2KN 2KP 1 3 106 This page is intentionally left blank ...
Page 308: ...2KN 2KP 1 5 88 This page is intentionally left blank ...
Page 412: ...2KN 2KP 2 3 60 This page is intentionally left blank ...
Page 435: ...1 1 INSTALLATION GUIDE INSTALLATION GUIDE FOR SIDE FEEDER ...
Page 442: ...INSTALLATION GUIDE FOR LARGE SIZE SIDE FEEDER ...
Page 460: ...INSTALLATION GUIDE FOR DOCUMENT FINISHER ...
Page 475: ...INSTALLATION GUIDE FOR CENTERFOLD UNIT ...
Page 490: ...INSTALLATION GUIDE FOR MULTI JOB TRAY ...
Page 501: ...INSTALLATION GUIDE FOR PUNCH UNIT ...
Page 512: ...INSTALLATION GUIDE FOR STOPPER GUIDE ...
Page 515: ...INSTALLATION GUIDE FOR PRINTING SYSTEM ...
Page 518: ...INSTALLATION GUIDE FOR SCAN SYSTEM ...
Page 520: ......
Page 521: ......